Eye Tracking System for Dynamic Visual Function Assessment
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Solution Overview
Problem
Current methods lack efficient and accurate assessment of visual function, particularly in diagnosing visual impairments and designing interactive experiences, as they fail to dynamically account for various eye movements and neurological statuses.
Innovation Solution
A system and method utilizing an eye-tracking device to detect gaze positions, processing eye movement data to determine dynamic evidence-of-visibility and trackability scores, analyzing fixation, saccade, smooth pursuit, and blink movements to assess visual function in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional static visual assessment methods are used, then the assessment process is simple, but the accuracy and dynamic adaptability of visual function assessment deteriorates
Solution Approach 1:
The system transitions from static visual assessment to dynamic real-time assessment by continuously tracking eye movements (fixation, saccade, smooth pursuit, optokinetic nystagmus) and updating visibility and trackability scores as the subject interacts with moving visual stimuli, enabling adaptive measurement of visual function
Solution Approach 2:
The system implements closed-loop feedback by monitoring eye movement data in real-time, comparing actual gaze positions with target stimulus positions, and using this information to dynamically adjust stimulus parameters and calculate evidence-of-visibility and evidence-of-trackability scores that reflect current visual function
2Adaptability or versatility
If multiple types of eye movements are tracked to accommodate varying neurological profiles, then the applicability to diverse populations improves, but the complexity of data processing increases
Solution Approach 1:
The system segments eye movement analysis into distinct categories (fixation, saccade, smooth pursuit, optokinetic nystagmus) with specific detection algorithms for each type, allowing independent analysis and scoring of different oculomotor functions to accommodate diverse neurological profiles
Solution Approach 2:
The assessment system is designed to universally evaluate multiple types of eye movements and neurological conditions through a unified platform that can detect and analyze various oculomotor behaviors, making it applicable to diverse populations including those with different visual and neurological impairments
3Speed
If real-time eye movement analysis is performed to update visibility and trackability scores, then the dynamic assessment capability improves, but the computational load increases
Solution Approach 1:
The system performs real-time analysis of critical eye movement parameters (gaze position, velocity, acceleration) to update visibility and trackability scores, focusing computational resources on the most informative metrics rather than processing all possible eye movement data at full resolution
Data Source
AI summary
A system and method for dynamically a visual function of a subject are provided where the system and method account for fixation eye movement(s); saccade eye movement (s); smooth pursuit eye movement(s); optokinetic nystagmus eye movement(s); and/or blink eye movement, the system for dynamically assessing a visual function of a subject is provided, comprising: i) a visual display; ii) an eye-tracking device configured to detect a gaze position of at least one eye of the subject; and updating in real time the appearance of a first stimulus to provide a second stimulus based on at least on of the updated evidence-of-visibility score and the updated evidence-of-trackability score for the first visual stimulus.